Glenroy River

42°18′01″S 172°26′00″E / 42.3002°S 172.4333°E / -42.3002; 172.4333 2nd sourceGlenroy River East Branch • coordinates42°05′12″S 172°24′21″E / 42.0867°S 172.4059°E / -42.0867; 172.4059 MouthMātakitaki River42°00′04″S 172°20′05″E / 42.001°S 172.3347°E / -42.001; 172.3347Basin featuresProgressionGlenroy River → Mātakitaki River → Buller River → Tasman SeaRiver systemBuller RiverTributaries  • leftMount Cann Creek, Granity Creek • rightBranch Creek, Pedro Creek, Shale Creek, Cascade Creek, Davis Creek

The Glenroy River is a tributary of the Mātakitaki River in the north of the South Island of New Zealand. It is widely known as a short class 4 river (River difficulty classification system for rafting).